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JavascriptExpansion.java
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JavascriptExpansion.java
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/*
*
* Javascript-Expansion
* Copyright (C) 2018 Ryan McCarthy
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
package com.extendedclip.papi.expansion.javascript;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import me.clip.placeholderapi.PlaceholderAPIPlugin;
import me.clip.placeholderapi.expansion.Cacheable;
import me.clip.placeholderapi.expansion.Configurable;
import me.clip.placeholderapi.expansion.PlaceholderExpansion;
import me.clip.placeholderapi.util.Msg;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerCommandPreprocessEvent;
public class JavascriptExpansion extends PlaceholderExpansion implements Cacheable, Configurable, Listener {
private ScriptEngine globalEngine = null;
private JavascriptPlaceholdersConfig config;
private final Set<JavascriptPlaceholder> scripts = new HashSet<>();
private final String VERSION = getClass().getPackage().getImplementationVersion();
private static JavascriptExpansion instance;
public JavascriptExpansion() {
instance = this;
}
/*
* I am just testing the waters here because there is no command system for expansions...
*/
@EventHandler
public void onCmdExecute(PlayerCommandPreprocessEvent event) {
String msg = event.getMessage();
if (!msg.startsWith("/papijsp")) {
return;
}
if (!event.getPlayer().hasPermission("placeholderapi.admin")) {
return;
}
event.setCancelled(true);
Player p = event.getPlayer();
// default command
if (msg.indexOf(" ") == -1) {
Msg.msg(p, "&7Javascript expansion v: &f" + getVersion());
Msg.msg(p, "&7Created by: &f" + getAuthor());
Msg.msg(p, "&fWiki: &ahttps://github.com/PlaceholderAPI-Expansions/Javascript-Expansion/wiki");
Msg.msg(p, "&r");
Msg.msg(p, "&7/papijsp reload &7- &fReload your javascripts without reloading PlaceholderAPI");
Msg.msg(p, "&7/papijsp list &7- &fList loaded script identifiers.");
return;
}
if (msg.equals("/papijsp reload")) {
Msg.msg(p, "&aReloading...");
int l = this.reloadScripts();
Msg.msg(p, l + " &7script" + (l == 1 ? "" : "s")+ " loaded");
return;
}
if (msg.equals("/papijsp list")) {
List<String> loaded = this.getLoadedIdentifiers();
Msg.msg(p, loaded.size() + " &7script" + (loaded.size() == 1 ? "" : "s")+ " loaded");
Msg.msg(p, loaded.toString());
return;
}
event.getPlayer().sendMessage("&cIncorrect usage &7- &f/papijsp");
}
@Override
public String getAuthor() {
return "clip";
}
@Override
public String getIdentifier() {
return "javascript";
}
@Override
public String getPlugin() {
return null;
}
@Override
public String getVersion() {
return VERSION;
}
@Override
public boolean register() {
if (globalEngine == null) {
try {
globalEngine = new ScriptEngineManager().getEngineByName(getString("engine", "javascript"));
} catch (NullPointerException ex) {
PlaceholderAPIPlugin.getInstance().getLogger().warning("Javascript engine type was invalid! Defaulting to 'javascript'");
globalEngine = new ScriptEngineManager().getEngineByName("javascript");
}
}
config = new JavascriptPlaceholdersConfig(this);
config.loadPlaceholders();
return super.register();
}
@Override
public void clear() {
if (!scripts.isEmpty()) {
scripts.stream().forEach(s -> {
s.saveData();
s.cleanup();
});
}
scripts.clear();
globalEngine = null;
instance = null;
}
@Override
public String onPlaceholderRequest(Player p, String identifier) {
if (p == null) {
return "";
}
if (scripts.isEmpty()) {
return null;
}
for (JavascriptPlaceholder script : scripts) {
if (identifier.startsWith(script.getIdentifier() + "_")) {
identifier = identifier.replace(script.getIdentifier() + "_", "");
return identifier.indexOf(",") == -1 ? script.evaluate(p, identifier) : script.evaluate(p, identifier.split(","));
} else if (identifier.equalsIgnoreCase(script.getIdentifier())) {
return script.evaluate(p);
}
}
return null;
}
public boolean addJSPlaceholder(JavascriptPlaceholder p) {
if (p == null) {
return false;
}
if (scripts.isEmpty()) {
scripts.add(p);
return true;
}
if (scripts.stream().filter(s -> s.getIdentifier().equalsIgnoreCase(p.getIdentifier())).findFirst().orElse(null) != null) {
return false;
}
scripts.add(p);
return true;
}
public Set<JavascriptPlaceholder> getJSPlaceholders() {
return scripts;
}
public List<String> getLoadedIdentifiers() {
List<String> l = new ArrayList<>();
scripts.stream().forEach(s -> {
l.add(s.getIdentifier());
});
return l;
}
public JavascriptPlaceholder getJSPlaceholder(String identifier) {
return scripts.stream().filter(s -> s.getIdentifier().equalsIgnoreCase(identifier)).findFirst().orElse(null);
}
public int getAmountLoaded() {
return scripts.size();
}
public ScriptEngine getGlobalEngine() {
return globalEngine;
}
@Override
public Map<String, Object> getDefaults() {
Map<String, Object> def = new HashMap<String, Object>();
def.put("engine", "javascript");
return def;
}
private int reloadScripts() {
if (!scripts.isEmpty()) {
scripts.stream().forEach(s -> {
s.saveData();
s.cleanup();
});
}
scripts.clear();
config.reload();
return config.loadPlaceholders();
}
public static JavascriptExpansion getInstance() {
return instance;
}
}